SpringBoot(企业级文件上传下载管理系统)

1 - 展示

所用到的技术有：SpringBoot，MySQL5.7，Semantic UI，thymeleaf，Mybatis，前端已适配移动端

一个文件上传下载的系统：耗时时间两个小时

2 - mysql 表

用户表

CREATE TABLE t_user_data(
	id INT(11) PRIMARY KEY,
	`username` VARCHAR(32) NOT NULL DEFAULT "",
	`password` VARCHAR(32) NOT NULL DEFAULT ""
)ENGINE=INNODB DEFAULT CHARSET= utf8
INSERT INTO t_user_data VALUES(1,"root","root")

提前内置一个root用户

文件表

CREATE TABLE t_file_data(
	id INT(11) NOT NULL,
	file_id VARCHAR(256) NOT NULL DEFAULT "",
	old_name VARCHAR(256) NOT NULL DEFAULT "",
	new_name VARCHAR(256) NOT NULL DEFAULT "",
	ext_name VARCHAR(50) NOT NULL DEFAULT "",
	path_name VARCHAR(50) NOT NULL DEFAULT "",
	size VARCHAR(200) NOT NULL DEFAULT "",
	`type` VARCHAR(50) NOT NULL DEFAULT "",
	is_img VARCHAR(8) NOT NULL DEFAULT "",
	download INT(6) NOT NULL DEFAULT 0,
	upload_time DATETIME NOT NULL
)ENGINE=INNODB DEFAULT CHARSET=utf8

为了简单查询方便，以用户的id和和文件表的id进行一对多的关联

3 - SpringBoot搭建

1 - maven依赖

<parent>
    <artifactId>spring-boot-starter-parentartifactId>
    <groupId>org.springframework.bootgroupId>
    <version>2.3.5.RELEASEversion>
parent>
<dependencies>
    <dependency>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-webartifactId>
    dependency>
    <dependency>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-thymeleafartifactId>
    dependency>
    <dependency>
        <groupId>com.alibabagroupId>
        <artifactId>druid-spring-boot-starterartifactId>
        <version>1.1.17version>
    dependency>
    <dependency>
        <groupId>mysqlgroupId>
        <artifactId>mysql-connector-javaartifactId>
        <version>8.0.23version>
    dependency>
    <dependency>
        <groupId>org.mybatis.spring.bootgroupId>
        <artifactId>mybatis-spring-boot-starterartifactId>
        <version>2.1.4version>
    dependency>
    <dependency>
        <groupId>org.projectlombokgroupId>
        <artifactId>lombokartifactId>
    dependency>
dependencies>
<build>
    <resources>
        <resource>
            <directory>src/main/resourcesdirectory>
        resource>
    resources>
build>

2 - application.yml

server:
  port: 8080
spring:
  thymeleaf:
    cache: false
    suffix: .html
    prefix: classpath:/templates/
  datasource:
    url: jdbc:mysql://localhost:3306/filedb
    driver-class-name: com.mysql.cj.jdbc.Driver
    username: root
    password: root
    type: com.alibaba.druid.pool.DruidDataSource
  servlet:
    multipart:
      max-file-size: 2000MB
      max-request-size: 2000MB
mybatis:
  mapper-locations: classpath:mapper/*.xml

3 - dao层
UserDao

public interface UserDao {

    public User queryUserByUsernameAndPassword(User user);
}

FileDao

import org.apache.ibatis.annotations.Param;


import java.util.List;

public interface FileDao {
    public List<FileData> queryFiles(Integer id);

    public Integer insertFile(FileData fileData);

    public Integer updateFileDownload(@Param("fileId") String fileId, @Param("number") Integer number);

    public FileData queryFileByFileId(String fileId);

    public Integer deleteFileByFileId(String fileId);
}

4 - sql映射编写
useMapper.xml

DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.kaiguo.dao.UserDao">
    <select id="queryUserByUsernameAndPassword"
            resultType="com.kaiguo.bean.User"
            parameterType="com.kaiguo.bean.User">
        select * from t_user_data where username = #{username} and password = #{password}
    select>
mapper>

fileMapper.xml

DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.kaiguo.dao.FileDao">
    <resultMap id="query" type="com.kaiguo.bean.FileData">
        <id property="id" column="id"/>
        <result property="fileId" column="file_id" />
        <result property="oldName" column="old_name" />
        <result property="newName" column="new_name" />
        <result property="extName" column="ext_name" />
        <result property="pathName" column="path_name" />
        <result property="size" column="size" />
        <result property="type" column="type" />
        <result property="isImg" column="is_img" />
        <result property="download" column="download" />
        <result property="uploadTime" column="upload_time" />
    resultMap>

    <select id="queryFiles" resultMap="query"
            parameterType="int">
        select * from t_file_data where id = #{id}
    select>

    <insert id="insertFile" parameterType="com.kaiguo.bean.FileData">
        insert into t_file_data values(#{id},#{fileId},#{oldName},#{newName},#{extName},#{pathName},#{size},
                                       #{type},#{isImg},#{download},#{uploadTime});
    insert>

    <update id="updateFileDownload">
        update  t_file_data set download = #{number} where file_id=#{fileId}
    update>
    
    <select id="queryFileByFileId" parameterType="string" resultMap="query">
        select * from t_file_data where file_id = #{fileId}
    select>

    <delete id="deleteFileByFileId" parameterType="string">
        delete from t_file_data where file_id = #{fileId}
    delete>
mapper>

5 - service层
由于service接口直接赋值dao的所以这里提供实现层代码
UserServiceImpl

@Service
public class UserServiceImpl implements UserService {
    private UserDao userDao;

    @Autowired
    public UserServiceImpl(UserDao userDao) {
        this.userDao = userDao;
    }

    @Override
    public User queryUserByUsernameAndPassword(User user) {
        return userDao.queryUserByUsernameAndPassword(user);
    }

    @Override
    public Integer updateFileDownload(String fileId, Integer number) {
        return null;
    }
}

FileServiceImpl

@Service
public class FileServiceImpl implements FileService {
    private FileDao fileDao;

    @Autowired
    public FileServiceImpl(FileDao fileDao) {
        this.fileDao = fileDao;
    }

    @Override
    public List<FileData> queryFiles(Integer id) {
        return fileDao.queryFiles(id);
    }

    @Override
    public Integer insertFile(FileData fileData) {
        return fileDao.insertFile(fileData);
    }

    @Override
    public Integer updateFileDownload(String fileId, Integer number) {
        return fileDao.updateFileDownload(fileId,number);
    }

    @Override
    public FileData queryFileByFileId(String fileId) {
        return fileDao.queryFileByFileId(fileId);
    }

    @Override
    public Integer deleteFileByFileId(String fileId) {
        return fileDao.deleteFileByFileId(fileId);
    }
}

6 - controller层
UserController

@Controller
public class UserController {

    private UserService userService;

    @Autowired
    public UserController(UserService userService) {
        this.userService = userService;
    }

    @GetMapping("/")
    public String index(){
        return "login";
    }


    @PostMapping("/user/login")
    public String login(@RequestParam("username") String username,
                        @RequestParam("password") String password,
                        HttpSession session) {
        User user = userService.queryUserByUsernameAndPassword(new User(null,username,password));
        if (user != null) {
            session.setAttribute("user", user);
            return "redirect:/showAll";
        }
        session.setAttribute("errorMessage","用户名或者密码错误");
        return "redirect:/";
    }
}

FileController

@Controller
public class FileController {
    private FileService fileService;

    @Autowired
    public FileController(FileService fileService) {
        this.fileService = fileService;
    }

    @PostMapping("/file/upload")
    public String uploadFile(@RequestParam("file") MultipartFile uploadFile,HttpSession session) throws IOException {
        User user = (User) session.getAttribute("user");
        if (session.getAttribute("user") == null || uploadFile.isEmpty()) {
            return "/";
        }
        String filePath = ResourceUtils.getFile(ResourceUtils.CLASSPATH_URL_PREFIX).getPath();
        File file = new File(filePath);
        Long size = uploadFile.getSize();
        String fileOldName = uploadFile.getOriginalFilename();
        String type = uploadFile.getContentType();
        String extension = uploadFile.getOriginalFilename()
                .substring(uploadFile.getOriginalFilename().lastIndexOf("."));
        String fileNewName = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()) + UUID.randomUUID().toString().replace("-","").substring(0,5) + extension;
        String dataDirPath = new SimpleDateFormat("yyyy-MM-dd").format(new Date());
        String pathName = "/files/" + dataDirPath;
        String realPath = filePath + pathName ;
        File dataDir = new File(realPath);
        String isImg = "否";
        if (type.contains("image"))
            isImg = "是";

        if (!dataDir.exists())
            dataDir.mkdirs();
        uploadFile.transferTo(new File(realPath,fileNewName));
        FileData fileData = new FileData();
        fileData.setId(user.getId())
                .setFileId(UUID.randomUUID().toString().replace("-","").substring(0,15))
                .setOldName(fileOldName)
                .setNewName(fileNewName)
                .setExtName(extension)
                .setIsImg(isImg)
                .setPathName(pathName)
                .setSize(size.toString())
                .setType(type)
                .setDownload(0)
                .setUploadTime(new Date());
        fileService.insertFile(fileData);

        System.out.println(dataDir.getAbsolutePath());
        return "redirect:/showAll";
    }

    @GetMapping("/file/download")
    public void downloadFile(@RequestParam("fileId") String fileId,
                             @RequestParam("filePath") String filePath,
                             @RequestParam("fileOldName") String fileOldName,
                             @RequestParam("fileNewName") String fileNewName,
                             HttpServletResponse response) throws IOException {
        FileData fileData = fileService.queryFileByFileId(fileId);
        fileService.updateFileDownload(fileId, fileData.getDownload() + 1);
        String path = ResourceUtils.getFile(ResourceUtils.CLASSPATH_URL_PREFIX).getPath();
        String realPathFile = path + filePath + "/" + fileNewName ;
        File file = new File(realPathFile);
        System.out.println(fileOldName);
        response.setHeader("content-disposition","attachment;fileName="+ URLEncoder.encode(fileOldName,"UTF-8"));
        ServletOutputStream outputStream = response.getOutputStream();
        InputStream is = new FileInputStream(file);
        IOUtils.copy(is,outputStream);
        IOUtils.closeQuietly(is);
        IOUtils.closeQuietly(outputStream);
    }

    @GetMapping("/file/delete")
    public ModelAndView delete(@RequestParam("fileId") String fileId,HttpSession session) {
        Integer integer = fileService.deleteFileByFileId(fileId);
        ModelAndView mv = new ModelAndView();
        mv.setViewName("redirect:/showAll");
        if (integer == 1) {
            mv.addObject("msg",true);
            return mv;
        }
        mv.addObject("msg",false);
        return mv;
    }

    @GetMapping("/showAll")
    public ModelAndView showAllFile(HttpSession session) {
        User user = (User) session.getAttribute("user");
        ModelAndView mv = new ModelAndView();
        if (session.getAttribute("user") != null) {
            List<FileData> fileData = fileService.queryFiles(user.getId());
            mv.addObject("files",fileData);
            mv.setViewName("showUserFile");
            return mv;
        }
        mv.setViewName("redirect:/");
        return mv;
    }
}

7 - 实体类
user表实体类

@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString
@Accessors(chain = true)
public class User {
    private Integer id;
    private String username;
    private String password;
}

file文件表实体类

@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString
@Accessors(chain = true)
public class FileData {
    private Integer id;
    private String fileId;
    private String oldName;
    private String newName;
    private String extName;
    private String pathName;
    private String size;
    private String type;
    private String isImg;
    private Integer download;
    private Date uploadTime;
}

4 - 前端页面

login.html 登录页面

doctype html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">

    <title>登录页面title>

    <script th:src="@{/js/jquery-3.1.1.min.js}">script>
    <link rel="stylesheet" type="text/css" th:href="@{/css/semantic.min.css}">
    <script th:src="@{/js/semantic.min.js}">script>
    <style>
        body{
            background-color: #008c8c;
        }
        .container{
            width: 500px;
            height: 300px;
            position: absolute;
            left: 50%;
            margin-left: -250px;
            top: 50%;
            margin-top: -150px;
        }
    style>
head>
<body>
    <h1 style="margin-top: 150px;text-align: center" class="ui red inverted header">文件管理h1>
    <div class="container">
        <h2 class="ui teal inverted header">登录页h2>
        <form th:action="@{/user/login}" class="ui form" method="post">
            <div class="field">
                <label>用户名label>
                <input type="text" name="username" placeholder="username">
            div>
            <div class="field">
                <label>密码label>
                <input type="password" name="password" placeholder="password">
            div>
            <input type="submit" style="width: 100%" class="ui black basic button">input>
            <h4 th:text="${session.errorMessage}" style="margin-top: 150px;text-align: center" class="ui red inverted header">h4>
        form>
    div>
body>
html>

showUserFile.html 展示页面

doctype html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>文件列表title>
    <script type="text/javascript" th:src="@{/js/jquery-3.1.1.min.js}">script>
    <link rel="stylesheet" type="text/css" th:href="@{/css/semantic.min.css}">
    <script type="text/javascript" th:src="@{/js/semantic.min.js}">script>
head>
<body onload="getQueryVariable('msg')">
    <div class="ui pointing menu">
        <a class="item">
            文件系统V1.0
        a>

        <div class="right menu">
            <a class="ui item">登出 a>
        div>
    div>

    <div style="width: 100%;" class="ui inverted segment">
        <div  class="ui active inverted placeholder">
            <h2 style="text-align: center;height: 100%" class="ui teal inverted header">欢迎 <span th:text="${session.user.username}">span> 您的登录h2>
        div>
    div>

    <h4 class="ui horizontal divider header">
        <i class="tag icon">i>
        我的文件
    h4>
    <table style="text-align: center" class="ui inverted table">
        <thead>
            <tr>
                <th>IDth>
                <th>原始名称th>
                <th>文件的新名称th>
                <th>文件的后缀th>
                <th>存储路径th>
                <th>文件大小th>
                <th>类型th>
                <th>是否是文件th>
                <th>下载次数th>
                <th>上传时间th>
                <th>操作th>
            tr>
        thead>
        <tbody>
        <tr th:each="file,fileStatus:${files}">
            <td><span th:text="${file.fileId}">span>td>
            <td><span th:text="${file.oldName}">span>td>
            <td><span th:text="${file.newName}">span>td>
            <td><span th:text="${file.extName}">span>td>
            <td><span th:text="${file.pathName}">span>td>
            <td><span th:text="${file.size + 'kb'}">span>td>
            <td><span th:text="${file.type}">span>td>
            <td><span th:text="${file.isImg}">span>td>
            <td><span th:text="${file.download}">span>td>
            <td><span th:text="${#dates.format(file.uploadTime, 'yyyy-MM-dd')}">span>td>
            <td>
                <a  th:href="@{/file/delete(fileId=${file.fileId})}"  class="ui orange basic button delete">删除a>
                <a onclick="downloadTime(window.event||event)" th:href="@{/file/download(fileId=${file.fileId},filePath=${file.pathName},fileOldName=${file.oldName},fileNewName=${file.newName})}" class="ui blue basic button">下载a>
            td>
        tr>
        tbody>
    table>
    <div class="ui modal">
        <i class="close">Xi>
        <div class="header">
            删除文件成功
        div>
        <div class="image content">
            <div class="image">
                An image can appear on left or an icon
            div>
        div>
        <div class="actions">

            <div class="ui inverted blue button cancel">Canceldiv>
            <div class="ui inverted red button ok">OKdiv>
        div>
    div>
    <h4 class="ui horizontal divider header">
        <i class="tag icon">i>
        上传文件
    h4>
    <div class="ui form error">
        <div class="field">
            <form th:action="@{/file/upload}" method="post" enctype="multipart/form-data">
                <label>上传文件label>
                <input type="file" name="file" placeholder="文件~~~~">
                <input style="width:100%" type="submit" class="ui button">input>
            form>
        div>
    div>
body>
html>
<script>
    function downloadTime(event) {
        let element = event.target.parentElement.parentElement.children[8].children[0]
        let count = element.innerText;
        count++
        element.innerText = count +"";
    }
    function getQueryVariable(variable)
    {
        var query = window.location.search.substring(1);
        var url=window.location.href;
        var vars = query.split("&");
        for (var i=0;i<vars.length;i++) {
            var pair = vars[i].split("=");
            if(pair[0] == variable){
                if (pair[1] == 'true') {
                    $('.ui.modal')
                        .modal('show');
                    if(url.indexOf("?")!=-1){                        //判断是否存在参数
                        url = url.replace(/(\?|#)[^'"]*/, '');           //去除参数
                        window.history.pushState({},0,url);
                    }
                }
            }
        }
    }


        $(".ui.button.cancel").click(function(){
            $('.ui.modal')
                .modal('toggle');
        });
        $(".ui.button.ok").click(function(){
            $('.ui.modal')
                .modal('toggle');
            return true
        });


script>

5 - 各个文件存放位置

总体结构以及问题
总体的代码编写其实不难，就是对于文件的存储以及下载可能有点逻辑上的难度。